08/02/2016 6:01 AM AEDT

Rose Byrne Welcomes First Child, Rocco, With Bobby Cannavale

Did someone tell Patty Hewes?

Bobby Cannavale and Rose Byrne welcomed a son last week. 

Rose Byrne and Bobby Cannavale welcomed a new baby boy named Rocco into the world last week. 

Cannavale announced his son's arrival during an appearance on "The Late Show with Stephen Colbert" on Friday while promoting his new HBO series "Vinyl."

“I had a baby on Monday, yes,” the 45-year-old actor revealed. “You know, I didn’t do anything. We [men] don’t do anything and I’m so tired. I think I’ve gained 28 pounds since Monday. I mean, I’m not kidding you. Like, this jacket fit so well, like, last Thursday. But I’ve been eating so much."

Rocco Cannavale? We're gonna give this little one T-minus 18 years or so before he's starring in the remake of "Mean Streets" because that name is just too much. 

This is Byrne's first child and Cannavale's second. The Broadway actor was previously married to actress and screenwriter Jenny Lumet, with whom he had one son, actor Jake Cannavale. Bobby and Jake played father and son on screen during the fourth season of "Nurse Jackie."

Byrne and Bobby Cannavale started dating back in 2012 and have gone on to co-star in films with varying degrees of success like "Annie" (horrible), "Adult Beginners" (better) and "Spy" (best). 

Acting alongside your significant other isn't always the recipe for success in Hollywood (see "Gigli," "The Amazing Spider-Man 2," "Daredevil," etc.), but it seems to be working all right for these two.

"It's so much fun," Byrne told People magazine about sharing the screen with Cannavale. "[It] is a very intense thing you can experience together ... It's not for everybody, but I think he's such a great actor."  

 We wish them the best of luck on and off screen. 

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